Catheter.



L. SCHOOLER.

CATHETER. APPLICATION FILED AUG. 14. 19H.

Patented July 23, 1918.

WITNESSES INVENTOR 6 day/e2;

ATTORNEY LEWIS SCHOOLER, OF DES MOINES, IOWA.

CATHETER.

Specification of Letters Patent.

Patented July 23, 1918.

Application filed August 14, 1917. Serial No. 186,191.

To all whom it may concern:

Be it known that I, LEWIS Sorroonnn, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented certain new and useful Improvements in Catheters, of which, the following is a specification.

This invention has relation to catheters, and the nature and objects thereof will be readily apparent to those skilled in the art to which it appertains, in the light of the following explanation of the accompanying drawings, setting forth what I now believe to be the preferred embodiment, or mechanical expression of my invention, from among other forms and arrangements within the spirit thereof and the scope of the appended claim.

However, an object of my invention is to provide a catheter designed with a view to facilitating its introduction into the male urethral canal, and for other purposes which will presently appear.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement of the parts to be hereinafter more fully described and particularly set forth in the appended claim.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear:

Figure 1, is a View in plan of a catheter constructed in accordance with my invention.

' Fig. 2, is a View thereof in side elevation.

Fig. 3, is a view on an enlarged scale in section showing the point thereof taken on the line 33 of Fig. 1, and

Figs. 4 and 5 are transverse sections taken on the lines 44 and 55 respectively of Fig. 1.

With reference to the drawings, 10 indi cates the body of catheter which is in the nature of a tube, but in accordance with my invention is oval or elliptical in cross section as shown in Fig. 5 to conform to the cross section of the urethral canal.

The point, when viewed in plan is formed with tapering sides 11 which terminate in a point. The under side of the point is curved upwardly as at 12 and the top side is curved downwardly as at 13 to a greater degree of curvature however, to permit the point of the catheter to slide easily over the middle lobe when the catheter is inserted. Thus it will be seen, when viewed from side elevation the point is formed with curved edges, and in plan the point is formed with flat sides 11 which converge toward a more or less sharpened edge. The canal of the catheter indicated at 14: extends through the instrument and opens into an eye 15 which is located upon the top side and slightly rearward of the point.

It has been my experience that a catheter designed in accordance with the outline given above and in accordance with the disclosure of the drawings presents many improvements in this art which have heretofore been unknown according to the best of my knowledge and belief. The introduction of the instrument if constructed in accordance with my invention, is accompanied by less pain than in the case of the instrument of conventional design having blunt points and which are circular in cross section throughout.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent is A catheter including a tubular body portion elliptical or flattened in cross section, and having an elliptical channel extending therethrough, a. penetrative formation at one end of the body portion including plane sidewalls in converging relation forming continuations of the flattened sides of the body portion, and edges curved toward each other to form a point in conjunction with the plane walls, said channel opening outward in one of said edges.

In testimony whereof I affix my signature in presence of two Witnesses.

LEWIS SCHOOLER.

Witnesses:

E. W. LEHMAN, Gnome SWANSON.

Copies at this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0. 

